Home / 28,475.94-39,295.78-15,728.93

Finding the Fourth Proportional to 28,475.94, 39,295.78 and 15,728.93

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Solution

The fourth proportional to 28,475.94, 39,295.78 and 15,728.93 is: 21,705.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,475.94 : 39,295.78 = 15,728.93 : x
  2. Step 2: Convert to fraction form
    28,475.94/39,295.78 = 15,728.93/x
  3. Step 3: Cross multiply
    28,475.94x = 39,295.78 × 15,728.93
  4. Step 4: Simplify right side
    28,475.94x = 618,080,572.92
  5. Step 5: Solve for x
    x = 618,080,572.92/28,475.94
  6. Step 6: Final answer
    x = 21,705.36

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.